Podivna Velikost RAID 5

[Zdenek Pizl]

sniper_2 na centrum.cz wrote:
> Prijemny slunecny den,
> 
> Vytvoril jsem si RAID 5 z 6 disku po 250GB :
> mdadm  --create /dev/md4 --chunk=32 --level=5 --raid-devices=5 \
>  --spare-devices=1 /dev/sdb1 /dev/sdd1 /dev/hda1 /dev/hdb1 /dev/hde1 /dev/hdf1 
> 
> Predpokladal bych velikost 1250GB. Velikost je vsak pouze 1000GB. 
> Proc? pripadne jak tam dokopat onech 1250GB? 
> Jeste se bych se chtel zeptat zda na nazor jaky soborovy system vybrat? 
> Zdali XFS nebo EXT3? Jedna se o webhostingovy server.

spare device jste tam dal , tak se nedivte, ze mate prave o jeho 
velikost mensi RAID-5

z.p.

> 
>  RAID 5
> 
> 3 or more hard drives are combined into one larger volume. The volume size is 
> (# of drives - 1) * drive size. One drive volume of space is lost because the 
> equivalent of that much storage space is used to store the backup information 
> for the other drives. 
> 
> 
> 
> 
> # mdadm --detail /dev/md4
> /dev/md4:
>         Version : 00.90.03
>   Creation Time : Tue May  9 08:22:05 2006
>      Raid Level : raid5
>      Array Size : 976783616 (931.53 GiB 1000.23 GB)
>     Device Size : 244195904 (232.88 GiB 250.06 GB)
>    Raid Devices : 5
>   Total Devices : 6
> Preferred Minor : 4
>     Persistence : Superblock is persistent
> 
>     Update Time : Tue May  9 08:45:59 2006
>           State : active, resyncing
>  Active Devices : 5
> Working Devices : 6
>  Failed Devices : 0
>   Spare Devices : 1


-- 
Zdenek Pizl
Internetovy obchod s aktualizovanymi distribucemi GNU/Linuxu
http://www.Linux-CD.cz
http://www.Linux-DVD.cz

______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email 
______________________________________________________________________